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Low side dual gate driver with low Idd (Quiescent current )

Vasu Poojary
Intellectual 380 points
Other Parts Discussed in Thread: UCC27524, UCC27614

Hello E2E Expert,

We are working on BMS application with low side gate driver to driver back to back connected low side MOSFET.

Since this is battery operated device , Gate driver operating current must be very low.

In this application , Gate driver out put will stay in static stage (no switching , either ON or OFF )

I checked with multiple gate driver (UCC27524, UCC27614, etc) but all has supply current in the range of 0.4mA to 1mA.

Can you please suggest gate driver with very low supply current VDD .

Thanks

Regards

Vasu

  • 0
    TI__Prodigy 376 points

    Hi Vasu,

    Thank you for asking this question. 

    An unorthodox method for reaching a low VDD supply quiescent current is to use the half-bridge driver UCC27282 (10-pin DRC or DPR packages). The half-bridge driver can be converted to be a dual-channel low-side by shorting VDD to HB and connecting HS to GND.

    This has several drawbacks, but when EN is held low the VDD supply quiescent current is 7uA.

    An additional method for reducing VDD supply quiescent current is to simply disconnect VDD when the driver is not in use. This may cause more power to be expended than would be saved depending on circuit design so it is worth testing this approach on samples first.

    If this will not work, could you please tell me some more specifics like what operating current range, supply current range, and drive strength you are looking for?

    If you would like to discuss this further off-thread to discuss private matters like specifics of the application, number of units, and schedule then please friend me so I can send you my email and loop in others.

    Regards,

    Carson Gamble